IET 450 Midterm
Six Type of Cams - correct answer-Plate/Disk
Translating/Wedge
Cylindrical
Conical
Face
Globonical
Def. of Kinetics - correct answer-Study of forces that cause motion (torque, gravity,
friction)
Def. of Kinematics - correct answer-Study of describing motion (distance, time,
velocity, acceleration)
Def. of Dynamics - correct answer-Branch of mechanics concerned with the motion
of bodies under the action of forces
Two types of Motion - correct answer-Linear Motion
Angular Motion
What is Linear Motion? - correct answer-"Translation"- All points on a body/object
move the same distance, in the same direction, and at the same time
What is Angular Motion - correct answer-"Rotary"- All points on a body/object move
in circles about the same central line or axis
What is Rectilinear Motion ? - correct answer-Motion along a straight line
What is Curvilinear Motion? - correct answer-Motion along a curved path
Three types of Coordinate Systems - correct answer-Cartesian
Cylindrical
Spherical
Elements of a Cartesian Coordinate System - correct answer-three perpendicular
planes XY, XZ, YZ
Elements of a Cylindrical Coordinate System - correct answer-polar axis (A)
longitudinal axis (L)
radial distance (Rho)
height (z)
angular coordinate (phi)
, Elements of a Spherical Coordinate System - correct answer-radial distance (r)
polar angle: ZY-Axis (theta)
azimuthal angle XY-Axis (phi)
Distance - correct answer-Measure of the length of the path followed (Scalar)
regardless of direction
Displacement - correct answer-Change in position (Vector)
Speed - correct answer-Rate of change of distance traveled with respect to time
(Scalar)
Velocity - correct answer-Rate of change of displacement with respect to time
(Vector)
Acceleration - correct answer-Rate of change of velocity with respect to time (Vector)
Jerk/Jolt - correct answer-Rate of change of acceleration of time
Degree of Freedom of a Solid Object - correct answer-6
D.O.F Types and Elements - correct answer-Orthogonal (X, Y, Z direction)
Rotational (Roll:X, Pitch:Y, Yaw:Z)
Two Types of Cam-Follower Motions - correct answer-Translation
Oscillation
Three types of Contacts of Translating Follower - correct answer-Radial
Positive-Return
Double-Roller
Three Types of Contacts of Oscillating Follower - correct answer-Flat-face
Roller
Spherical
Constant Velocity Characteristics - correct answer-Uniform-Velocity Profile
Straight-line Profile
Straight line from zero to end of rise
Constant Velocity Disadvantages - correct answer--Infinity acceleration at the
beginning and end
-Consequent large inertia forces at these points
-Inadequate in application of moderate to high velocity
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